Crank handle



J. o. HANSON cluum unupna Oriana! Filed lay 10.1924

I fam v J. k w

Patented July 20, 1926.

UNITED. STATES Parent OFFICE.

JOHN G. HANSON, SANISI-I, NORTH DAKOTA.

CRANK HANDLE.

Application filed May 10, 1924, Serial No. 712,406. Renewed DecemberlS, 1925.

This invention relates to a crank handle or crank device for internal combustion en-;

gines and has for its primary object the mounting of a crank arm so that the same n'iay be yieldably left engaged with the crank element or may be entirely disengaged. V 7

An object of the invention is the construction of a crank handle Which may be left attached to thccrankingstub shaft Without possibility of accidentally'losing same but may be readily entirelydisconnected from,

the stub shaft if found advisable. V

lVith these and other objects invieWIthe invention will be better understood from the following detailed description taken in connection with the accompanying drawing wherein:

Fig.1 is a side elevation of my improved 20 crank handle shown in applied position.

Fig. 2 is an enlarged sectional view.

F 1g. 8 is a sectional view on the line 33 Fig. 1.

Fig.4 is a sectional view on'the line l l Fig. 1. 7

Again referring to the drawingfillustrating one of the many constructions of my invention the numeral 1 designates in its entirety the usual cranking element of an internal combustion engine. In this particular case a 'slidable stub shaft 2 has an annular groove 3 arranged contiguous to the lugs The .crank arm5 has a socket 6 re ceiving therein the groove 3' and further having recesses? for the reception of the lugs 4- during the crankingoperation. 'The nu-- meral 8 designates the usual spring to bring about disengagement of the stub shaft and crank shaft of. the engine. The socket is shaped end 10 of a leaf spring may engage in the groove 3 when the socket has been moved to pos t on to engagetheylugs. Se-

provided with an opening 9 so that the cam cured to the end of the arm 5 is a pin 1Q upon which isrotatably mounted the sleeve 13, thepin being provided .With a head 14 to prevent disconnection of the sleeve- From the foregoing description taken in connection with the accompanying drawing it will be seen that the crank arm may be readily slipped on the stub shaft and held in place by movementof the leaf spring with the groove so as to prevent accidental loss of the crank arm but upon exerting predetermined pressure in the required direction 5 the crank arm may be disconnected from the stub shaft.

It is of course to be understood that the invention may be constructed in various 7 other manners and the parts associated in different relations, therefore, I do not desire to be limited in any mannerexcept as set V forth inthe. claim hereunto appended.

Having thus described my invention hat i I claim is: I .65

In combination with a cranking element for internal combustion engines including a longitudinally.slidable stubshaft having an annular groove in its perimeter adjacent one end, a longitudinallydisposed lug on the shaft contiguous to the groove, a bearing supported for the shaft,'a crank handle having a socket for receiving the grooved end of the shaft and having recesses for receiving the lugs; a coil spring on the shaft disposed between the socket and bearingsup port, said socket having an opening and a leaf spring secured tothesocket at one side of the opening and h'aving a cam shaped end normally projecting through the openso ing and adapted to engage within the groove. r h In testimony whereof I affix my signature. i w

JOHN G. HANSON. 

